US2566562A - Scraper and backfilling blade attachment for tractors - Google Patents

Description

P 1951 o. M. HALE 7 SCRAPER AND BACKFILLING BLADE ATTACHMENT FOR TRACTORS' Flled Aprll '7 1949 mm m 0 Patented Sept. 4, 1951 UNITED STATES P TsNroFFlcE SCRAPER AND BACKFILLING BLADE ATTACHMENT FOR TRACTORS Olga M. Hale,Walteria, Calif. 1

Application April 7, 1949, Serial No. 85,992

'1'Claim. (01. 371-153) This invention relates to a scraper and backfilling blade attachment for tractors, wherein the scraper blade can be manually rotated into a position to scrape a given earth surface or to push dirt as when backfilling.

An object of my invention is to provide a novel scraper and backfilling attachment of the character stated, in which the scraper blade can be quickly and easily rotated by manual manipulation, thus enabling the operator to change the 7 blade from a scraping to a pushing position, as

desired.

Still another object of my invention is to provide a novel manually operable connection with the scraper blade, this manually operable connection or link being movable into a latched position when the blade is in either scraping or backfilling position.

A feature of my invention is to provide a novel control for a scraper blade, which is rapid in its operation and which does not require a forward or backward movement of the device itself orthe tractor on which it is mounted, in order that the scraper blade may be actuated.

Other objects, advantages and features of invention may appear from the accompanying drawing, the subjoined detailed description and the appended claim.

In the drawing:

Figure 1 is a perspective view of my blade attachment on the tractor.

Figure 2 is a side elevation of my attachment with the blade in scraping position.

Figure 3 is a view similar to Figure 2. but with the blade in pushing or backfilling position.

Figure 4 is a view similar to Figure 3, but with the linkage locked so that the blade is held in backfilling position.

Figure 5 is a fragmentary transversal sectional view of the box beam and one of the scarifying blades therein.

Figure 6 is a view similar to Figure 5 showing the blade in its inoperative position.

Figure '7 is a sectional view taken on line 1-1 of Figure 2.

This application is an improvement on my copending application for Earth Moving Attachment for Tractors, Serial No. 770,285, filed on August 23, 1947.

Referring more particularly to the drawing, the usual power tractor includes a rear shaft housing 2, to which are pivotally attached the draw bars 3--4. A turn buckle 5 is also attached to the axle housing of the tractor at one end and to the upper end of the A frame 6 of the scrap- 2 ing attachment 1. The scraping attachment I includes a box beam 8 which extends transversally behind the tractor l.

A pair of ears 9--9 project from the beam 8 and the A frame 6 is fixedly attached to these ears. A plurality of scarifying fingers ID are mounted in the beam 8, in a usual and well known manner, which may include the wedge The fingers It can either project downwardly so as to engage the earth, or they can be reversed when the attachment is being used merely for scrapin or backfilling purposes.

A mounting plate I2 is fixedly attached to each end of the beam 8 and these plates serve as a mounting means for the scraper blade l3 through the medium of side plates |6|'|. The blade i3 includes discs |4-|5, one on each end thereof, and these discs are pivotally mounted in side plates iii-IT respectively.

The side plates 6-41 are mounted on the mounting plates l2 and there may be provided a pair of bolts |8--|9 which extend through the mounting plate and the side plates, and bolts I9 may be removed thus enabling the side plates |6-|l to pivot about bolts IS on the mounting plates 2, enabling the blade ii! to be raised or lowered, as desired. This mounting method has been described in greater detail in my co-pending application above set forth.

The blade I 3 is formed with two projecting lugs 20 and a lever arm 2| is pivotally secured to each of these lugs. A link 22 is pivotally mounted on one end to the arms 2|, and at the other end to a post 22 which projects upwardly from the scraper frame. A handle 23 is fixedly secured to the upper edge of the arms 2| and projects forward towards the tractor I. This attachment is by means of the block 22 which extends horizontally to engage the link 22 when latching the parts against accidental movement.

By lifting upwardly on the handle 23, the arm 2| will be swung upwardly, as shown in Figure 3, and at the same time will rotate the blade I3 to the position shown in Figure 3. By pressing the handle 23 downwardly again, the link 22 is pressed downwardly at an angle as shown at Figure 4, thus locking the arm 2| in position to hold the blade I3, as shown in Figure 4. If it is desired to return the blade to the position shown in Figure 2, the handle 23 is again lifted thus again causing the blade |3 to rotate, and after the blade is again in the position shown in Figure 2 the handle 23 is depressed, thus again locking the arm 2| in the position shown in Figure 2.

Briefly, the arms 2| and the link 22 form a toggle joint, which joint is moved out of alignment so that the forces on these members cannot cause the joint to move to the position shown in Figure 3 until the handle 28 is manually raised.

Having described my invention, I claim:

A scraper and backfilling blade attachment for tractors comprising a beam extending transversely off the tractor and at the rear df thefi'am'e, a pair of fixed spaced ears on saidbeam, an 'A frame fixedly attached to the ears and rising above said beam, side plates fixed to each endo'f the beam, a scraper blade rotatably mounted in said side plates and between the same, a pair of spaced lugs on the scraper blade, a lever arm pivotally attached to each lug, a liiik 'pivdtally secured at one end to both of the lever arms Land at the other end to a post rising from said beam, a handle fixedly secured to the lever arms and a ment.

OLGA M. HALE.

REFERENCES CITED fl he following references are of record in the file (of this patent:

UNITED STATES PATENTS :Number Name Date 945,7 87 Krajeck Jan. 11, 1910 1974,1590 Miller Sept. 18, 1934 25309, 750 Carrington Feb. 2, 1943 253791469 Bagan July 3, 1945 2433319 :Arps Dec. 23, 1947 2,434,818 Taylor Jan. 20, 1948 25448384 Arps June 22, 1948

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